First thanks for your kindness,
When i try to connect to my server by using plink it seems that nothing happens. After several minutes it says "unable to connect". The strange Thing is that before upgrading all worked like a charm. In addition by using the same parameters in other softwares I am still able to connect to my server. Please tell me how can i give you additional informations.

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This is not a problem, but keep in mind that developing HeidiSQL, user support and hosting takes time and money.